In the chemical reaction 2H2 + O2 -> 2H20, what is the mole ratio of oxygen to water. A) 8:1

B)1:2

D)2:1

C)4:1​

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.